An ink jet printer has a line print type recording heads, respectively extending in a width direction of a recording medium, for jetting ink to the recording medium, and ultraviolet ray irradiating devices, having ultraviolet ray sources, for irradiating the ink arriving at the recording medium with ultraviolet rays to cure the ink. The ultraviolet ray irradiating devices are arranged on a downstream side of the recording heads in a feeding direction of the recording medium. A quantity of the ultraviolet rays emitted from the ultraviolet ray sources of the ultraviolet ray irradiating device, which is arranged on the most downstream side in the feeding direction of the recording medium, is set to be larger than that of the ultraviolet rays emitted from the ultraviolet ray sources of each of the other ultraviolet ray irradiating devices.

 
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